https://medium.com/@guyavraham/how-to-navigate-from-mobile-app-to-messenger-bot-chat-and-back-to-the-app-d3ff057b594e
Example for if you want to redirect customers back into an app.
Allows you to have https url that creates deep link implementation by IOS or Android
For a use case where you know they already have on their phones.
Not for when you want navigation to the App/Play store.
Was useful to me when I wanted to point my facebook bot users back to the app they came from https://docs.expo.io/workflow/linking/#linking-to-your-app

How it works:

For IOS it will be redirected on page load (with popup for user approval).
For Android the user will have to click a button (href). https://youtu.be/iFwm8fYxUQg

Deployment

If you already have existing aws account, I recommend auto deploying this kind of React web app with : aws-amplify

It should be self explanatory to define the following with no more then 10 minutes:

Connect your Github repo.
Define auto deploy on push to master branch.
Define custom domain so you user will understand what is the purpose of the web page.

There you go, now you have a web page with https prefix you can define for your bot for when a user asks to “go back to app”.